<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div class="logo">
        <img src="../assets/logo.png" alt="logo" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="asidewidth">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF"
          :unique-opened="true"
          :collapse="isCollapse"
          :collapse-transition="false"
          :router="true"
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu
            :index="'/' + item.path + ''"
            v-for="item in menulist"
            :key="item.id"
          >
            <!-- 一级菜单模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconlist[item.id]"></i>
              <!-- 文本 -->
              <span class="menuName">{{ item.authName }}</span>
            </template>
            <el-menu-item-group>
              <!-- 二级菜单 -->
              <el-menu-item
                :index="'/' + subItem.path + ''"
                v-for="subItem in item.children"
                :key="subItem.id"
                @click="saveNavState('/' + subItem.path)"
              >
                <template slot="title">
                  <!-- 图标 -->
                  <i class="el-icon-menu menuName"></i>
                  <!-- 文本 -->
                  <span>{{ subItem.authName }}</span>
                </template>
              </el-menu-item>
            </el-menu-item-group>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      menulist: [],
      iconlist: {
        125: 'iconfont icon-users',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao',
      },
      //是否折叠
      isCollapse: false,
      asidewidth: '200px',
      //被激活的链接地址
      activePath: '',
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath');
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
    },
    // 切换菜单折叠按钮
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
      if (this.isCollapse) return (this.asidewidth = '64px')
      this.asidewidth = '200px'
    },
    //保存激活的菜单的路由
    saveNavState(activePath) {
      console.log(activePath);
      window.sessionStorage.setItem('activePath', activePath);
      this.activePath = activePath
    },
  },
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #fff;
  font-size: 25px;
  > .logo {
    display: flex;
    align-items: center;

    > img {
      width: 60px;
      height: 60px;
      margin-right: 10px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.menuName {
  margin-left: 10px;
}
.toggle-button {
  background-color: #4a5064;
  text-align: center;
  font-size: 10px;
  line-height: 20px;
  color: #fff;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>